“La Craie” (or “chalk” in French) refers to the abundance of white, soft rock in the area known locally as “Tuffeau.” High on the hills of Vouvray, one can tour the homes of locals who live in caves dug from this soft chalk. It is found in the vineyards as well, ensuring good drainage down the slopes and keeping the soil warm at night to help keep the roots from experiencing drastic temperature changes.